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Seudónimo
01-09-2015
Mathematics
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5n+9=2n solve equation
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Аноним
Аноним
01-09-2015
5n+9=2n
5n+9−2n=2n−2n
3n+9=0
3n+9−9=0−9
3n=−9
3n/3=−9/3
n=−3
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